【开场白】
Good afternoon， my dear friends.
I am very happy to meet you here.It is my great honor to communicate with you at such a special occation.First of all，please allow me to express my appreciation to you all to listion to me.
【结尾】
-In conclusion， I'd like to
-I'd like to finish by
-Finally
-By way of conclusion
-I hope I have made myself understood
-I hope you have found this useful
-I hope this has given you some idea/clear idea/an outline of
-Let me end by saying
-That， then was all I had to say on
-That concludes our presentation
-I hope I've managed to give you a clearer picture of
-If there are any questions， I'd be delighted to
-Thank you for your attention
-Let's break for a coffee at this point
-I am afraid that the clock is against us， so we had better stop here
-You have been a very attentive audience---thank you
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